Juncus biglumis L.
two-flowered rush (twoflowered rush)
Juncaceae (Rush family)

Introduction to Vascular Plants

Photograph

Once images have been obtained, photographs of this taxon will be displayed in this window.Click on the image to enter our photo gallery.
Currently no image is available for this taxon.


Map

E-Flora BC Static Map

Distribution of Juncus biglumis
Click here to view the full interactive map and legend

Species Information

General:
Perennial, tufted herb from short rhizomes; the stems erect, 3-20 cm tall.
Leaves:
Basal, nearly circular in cross-section, tapered, lacking cross-walls.
Flowers:
Inflorescence a single, terminal head of usually 2 (or 3) flowers, the flowers lacking bractlets; perianth segments dark brown with lighter tips, 2.5-3 mm long, blunt, subequal; stamens 6; anthers 0.3-0.4 mm long, shorter than the filaments; bracts blunt, longer than the flowers.
Fruits:
Capsules, egg-shaped, notched, 1.5-2 times longer than the perianth segments, dark; seeds spindle-shaped, about 0.7-0.9 mm long, with short tail-like appendages at each end.

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

USDA Species Characteristics

Flower Colour:
Purple
Blooming Period:
Summer
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
Source:  The USDA

Ecology

Ecological Framework for Juncus biglumis

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Avg

Min

Max

Elevation (metres)
1652 940 2000
Slope Gradient (%)
19 0 70

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

261 40 350
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 2 7
Modal Nutrient Regime
Class
C
# of field plots
 species was recorded in:
14
Modal BEC Zone Class
ESSF

All BEC Zones (# of stations/zone) species was recorded in

BAFA(5), ESSF(6)

Habitat and Range

Wet seepy places, mossy ledges, gravelly shores and marshes in the subalpine and alpine zones; infrequent in BC N of 55degreeN; circumpolar, N to AK, YT and NT, E to PQ and S to CO; Greenland, Eurasia.

SourceThe Illustrated Flora of British Columbia